We have released new version of BS.Player 2.36 with included automatic detection and download of subtitles.
How it works?
Play a video file, BS.Player will try to get a list of available subtitles from opensubtitles.org (only if option Enable Online subtitles is enabled in Preferences>Online subtitles).
EDITED: In future builds you will also be able to enter different subtitle providers, by entering their URL to subtitle database.
When a list is displayed, select desired subtitle by ticking it and click on Download. After subtitle is downloaded, click on Close to close window.
That was a bit obvious. 
Enjoy the best video playback with subtitles!
Additionaly, new BS.ControlBar includes improved search engine, functionallity and design. Quick search (or default search) and home page search will now be powered by Google search engine giving you most relevant search results possible!
Important: By installing and using BS.ControlBar (also by using BS.Player for Quick search and home page search) you are helping us get some of much needed funding for future development of BS.Player! Read entire article here.